import java.util.concurrent.ArrayBlockingQueue;

/**
 * @author
 */
public class AsyncRun05 {
    private static final ArrayBlockingQueue<Integer> queue = new ArrayBlockingQueue<>(1);

    public static void main(String[] args) throws Exception {
        long start=System.currentTimeMillis();

        SumThread sumThread = new SumThread();
        sumThread.start();
        Integer result = queue.take();
        // 确保  拿到result 并输出
        System.out.println("异步计算结果为："+result);
        System.out.println("使用时间："+ (System.currentTimeMillis()-start) + " ms");
    }

    private static int sum() {
        return fibo(36);
    }

    private static int fibo(int a) {
        if ( a < 2) {
            return 1;
        }
        return fibo(a-1) + fibo(a-2);
    }

    static class SumThread extends Thread {
        @Override
        public void run() {
            try {
                int result = sum();
                queue.add(result);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }

    }
}
